Yes I see the difference better between losing and death now. I guess if you / everyone dies, then you've no choice (strictly speaking) but to restart the whole thing. I play solo (ROTR) - so I've got more time to grind through again ;)
One thing that I'm still wondering about - in the rulebook it asks you at the start to decide if you're playing a scenario, an adventure or an adventure path - and place the relevant card on the table.
Why do so?
You could just play a scenario card every time, and progress to next if you win it. And if it happens to be the last in an adventure - then great, you've completed the adventure, and if that adventure happens to be the last, then great, you've completed the path.
This relates to my original question, if you had to decide beforehand scenario / adventure / path - then what are the consequences of that choice?
The way I would read this - is if I decide to take on a single scenario to grind out some better cards - and I lose the scenario - no problem, I wasn't on an adventure. But if I'm in the middle of an adventure and lose - then I would have to restart, I couldn't just replay the same scenario until I got through the adventure.